1 files changed, 2 insertions, 0 deletions
diff --git a/cqrlogo.h b/cqrlogo.h
index 00795b9..430df26 100644
--- a/cqrlogo.h
+++ b/cqrlogo.h
@@ -8,6 +8,8 @@
 #ifndef _CQRLOGO_H
 #define _CQRLOGO_H
 
+#define _GNU_SOURCE
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>